1366 - Incorrect integer value: '' for column `mapshopatlogis`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '8d7f820070ceabbc0fbc31f83ae30055', '216.73.216.3', '1766444044', '1766444044', '/index.php/language/en/cat/c40_Map-Konfigurator.html')

[XT SQL Error]